Integral Flanged Window in Recessed Openings with Open Stud Construction BEFORE Water-Resistive Barrier (WRB) is Installed
STEP 1 FOR RECTANGULAR WINDOWS
A. Attach apron made of DuPont™ Tyvek® WRB under sill. Apron should extend at least 10” beyond sides of rough opening jambs (or to fi rst stud in open stud construction), and far enough below the rough opening to overlap the sill plate or the DuPont™ Tyvek® WRB below. The top of the apron should be securely attached to wall and the bottom of apron should be left free to overlap later with DuPont™ Tyvek® WRB installation.
A B
C
STEP 2
Make four corners for the recessed window:
A. Remove DuPont™ FlexWrap™ RW and hold the corner with the attached adhesive with the fi rst and third fi nger.
B. Place index fi nger on tip of upper edge of adhered butyl and pinch butyl triangle at the base with thumb and middle fi nger.
C. Using the other hand, invert fl ashing to form a three-dimensional corner.
D. Repeat three more times for three remaining corner pieces.
1
A. Once inverted, fold 1 and 2 towards the crease line and complete the folding process by folding section 3 onto 4.
CORRECT SHINGLING
CORRECT ORDER OF PRODUCT INSTALLATION NOTE: Please refer to this diagram as you proceed for proper installation. An accepted variation to the schematic would be to install the DuPont™
StraightFlash™ at the sill and head before the respective corners (i.e., placing Step 2 before Step 1 and Step 6 before Step 5). Any other sequence deviation from the above described process is incorrect.
A
3
4 2
1
FRONT VIEW CORNER DETAIL No Gap in Corner
WRONG CORRECT
Window Jamb
Sill DuPont™ FlexWrap™ RW
B
C STEP 4
A. Remove release paper fi rst from either side 3 or side 4 – but not both.
NOTE: Keeping the remaining release papers intact will keep the DuPont™ FlexWrap™ RW more rigid and help to maneuver the fl ashing into the corners.
B. Place prepared DuPont™ FlexWrap™ RW tightly into corner of outer sill.
Once in place, lift exposed butyl and adhere to window jamb.
C. Lift the remaining side and remove second piece of release paper exposing butyl. Fold down and attach butyl to sill.
1
2
A
B
C
D
E STEP 5
A. Fold fl aps 1 and 2 and remove both pieces of release paper. Adhere butyl to inner recessed sill plate.
B. Fan out outer corners of the DuPont™ FlexWrap™ RW and tack corners on to the face of the wall in three places using recommended fasteners.
C. Place a bead of DuPont™ Residential Sealant, DuPont™ Commercial Sealant, or recommended sealant inside the corner fl ap behind the loose triangular fl ap of the corner piece.
D. Press down the loose triangular fl ap onto sealant in the corner piece.
E. Staple down fl ap.
B C
A
D
S
FRONT VIEW CORNER DETAIL No Gap in Corner
WRONG CORRECT
A. Using 9” width DuPont™ StraightFlash™, cut the length of the fl ashing slightly SHORTER than the length of the outer sill (S).
B. Break all the perforations on the release paper by folding the fl ashing. If some perforations do not break, apply pressure with fi ngers to the area on the opposite side to break the remaining perforations.
NOTE: Failure to break all perforations will result in tearing of the release paper during its removal thereby making the installation diffi cult.
C. Fold in, remove center release paper and adhere to sill.
D. Unfold remaining DuPont™ StraightFlash™, remove remaining pieces of release paper and adhere butyl adhesive side to face of recessed sill and to face of the DuPont™ Tyvek® WRB.
STEP 7
A. Cut DuPont™ FlexWrap™ NF at least 12” LONGER than width of inner/recessed sill (X).
B. Remove fi rst piece of release paper. Cover horizontal sill by aligning inside edge of sill, and adhere into rough opening along sill and up jambs (min. 6” on each side).
C. Remove second release paper.
D. Fan out DuPont™ FlexWrap™ NF at bottom corners onto the face of the wall.
Coverage of DuPont™ FlexWrap™ NF should be 2” to 3” onto the face of the framing.
A
B STEP 8
A. Apply DuPont™ Residential Sealant, DuPont™ Commercial Sealant, or recommended sealant on three sides (jambs and head) as shown below. If sealant is applied to the sill, ensure that there are at least two (2) 2” gaps in the sealant bead for every 4’ of window to allow for drainage.
B. Install window per manufacturer’s instruction.
X
B
C A
B STEP 9
A. Fold 9” DuPont™ StraightFlash™ to break all of the perforations on the release paper.
If some perforations do not break, apply pressure with fi ngers to the area on the opposite side to break the remaining perforations.
NOTE: Failure to break all perforations will result in tearing of the release paper during its removal making the installation diffi cult.
B. Fold DuPont™ StraightFlash™ into three sections and remove only the center release paper. Place exposed butyl adhesive side onto the jamb.
NOTE: Keeping the remaining release papers intact will keep the DuPont™ FlexWrap™ RW more rigid and help to maneuver the fl ashing into the corners.
C. Once the butyl is adhered to the rough opening of the jamb, the two remaining release papers can be removed and the fl ashing can be attached to the window fl ange and onto the face of the exterior sheathing.
D. Repeat on opposite jamb.
STEP 10
A. Install DuPont™ FlexWrap™ RW on the upper corner of the window rough opening onto the window fl anges in a similar manner used on lower corner pieces. (see Step 4) B. Fan out outer corners of the DuPont™ FlexWrap™ RW and tack corners onto the face
of the wall in three places using recommended fasteners.
B A
C STEP 11
A. Place a bead of DuPont™ Residential Sealant, DuPont™ Commercial Sealant, or recommended sealant on underside behind corner fl ap of loose triangular fl ap in corner.
B. Press down loose triangle fl aps onto the sealant in the corner piece.
C. Staple down fl ap after applying the sealant behind fl ap.
Y
Interior
STEP 12
A. Cut a piece of 9” width DuPont™ StraightFlash™ one inch (1”) SHORTER than distance of “Y“.
B. Break perforation lines as described in jamb and sill instructions. (see Step 9) C. Remove the outer pieces of release paper.
D. Place on window fl ange.
E. Remove inner piece of release paper and adhere to the head.
F. Remove last and outer piece of release paper and adhere to exterior sheathing.
STEP 13
Install DuPont™ Residential Sealant, DuPont™ Commercial Sealant, or recommended sealant (and backer rod as necessary) around the window opening at the interior. It is also acceptable to use DuPont™ Window & Door Foam or recommended foam. The seal created by the sealant (and backer rod as necessary) or foam will also serve as a back dam. DuPont™ Residential Sealant or DuPont™ Commercial Sealant should be tooled fl at to allow the natural curing process to create a concave shape. Be sure that the sealant penetrates the grooves of the DuPont™ FlexWrap™ NF around the sill.
NOTE: Installations that specify a window/door design rating of DP45 or greater require extra precautions. See General Instructions for performance requirements exceeding this design rating.
STEP 14
After installing the DuPont™ Tyvek® WRB, cut as shown to expose window and apron.
(Refer to the DuPont™ Tyvek® Water-Resistive Barriers Installation Guidelines to install the DuPont™ Tyvek® WRB properly).